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For example the delivery date cannot be before the order date.
Checks to ascertain that only expected characters are present in a field.
For example: Data type validation is customarily carried out on one or more simple data fields.
The simplest kind of data type validation verifies that the individual characters provided through user input are consistent with the expected characters of one or more known primitive data types; as defined in a programming language or data storage and retrieval mechanism as well as the specification of the following primitive data types: 1) integer; 2) float (decimal); or 3) string.
Data that does not conform to these rules will negatively affect business process execution.
Therefore, data validation should start with business process definition and set of business rules within this process.
Whether a grade is correct can only be established by clerical checks or by reference to other files.
Such complex processing may include the testing of conditional constraints for an entire complex data object or set of process operations within a system.Using these data definitions, a range of software validation checks can be carried out.Consistency check ensures that the entered data is logical.A validation process involves two distinct steps: (a) Validation Check and (b) Post-Check action.The check step uses one or more computational rules (see section below) to determine if the data is valid.